Wrench.



, W. IRING.

WRENCH.

APPLICATION FILED JUNE 13. 1912.

Patented Feb. 18, 1913.

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' WILLIAM IRING, OF NEW YORK, N. Y.

WRENCH.

Specification of Letters Patent.

Patented Feb. 18,1913.

Application filed June is, 1912. Serial No. 704,370. r

To all whom it may concern:

Be it known that I, WILLIAM IRING, a citizen of the United States,residing in the city, county, and State of New York, have inventedcertain new and useful Improvements in Wrench'es, of which the followingis a specification.

My invention relates to wrenches and'is an improvement upon the wrenchcomprised in the patent to Adalbert Iring, No. 1,028,883, dated June 11,1912, the object being to provide improved means for securing themovable jaw in adjusted position, as will more fully appear in thefollowing description and claim.

Referring to the accompanying drawing:Figure l is a side elevation ofthe wrench shown partl in section with the adjustable jaw locke Fig. 2'is a similar view as Fig. l with the adjustable jaw unlocked and thehandle broken away, and

Fig. 3 is a view of Fig. 1 viewed from the right with the handle brokenaway.

The wrench comprises a handlea having a head I) fixedly secured orintegrally formed thereon. The head is formed with a jaw 0 preferablypositioned at the rear end thereof, and has a longitudinal chamber dpassing through it. The wrench is provided with a fiat surface e havinga longitudinal slot f communicating with the chamber below it. A movablejaw g is disposed to slide upon the surface 6 and is provided with atongue h which engages with the chamber d to secure the jaw firmly insliding relation on the surface a of the wrench. The union of the wrenchand jaw may be made in several ways, the preferred type being made as.

shown, by formin the chamber d rounding at the top, and forming thetongue with rounding longitudinal flanges 0n eitherside to engage therounding parts of the chamber. This makes a strong joint and one that.is simple to construct, but any form of joint of usual constructionwill answer the purposes of my invention.

The bottom of the tongue h is formed with teeth 71 for locking the jawin adjusted 3' formed on a locking ar is disposed within the chamber d.The bar is secured to the chamber through means of the pin-Z and slotsm, the pin preferably passing through the bar and the slots preferablybeing formed through the head of the wrench, although the reverse may befollowed if desired.

The bar is is held normally up against the movable jaw g by means of aspring n secured to one endof the bar as by the screw 0, and curved orbent to set upon the base of the chamber at its middle portion, and tocontact with the bar at its opposite end. The spring is in thisposition, under tension to enable it to hold the bar firmly against thejaw. By this construction the bar and jaw are always looked together, asshown in Fig. 1, unless the bar is manually operated to disengage them.This is accomplished by forcing the forward end ofthe bar downward asshown in Fig. 2, the barbeing extended beyond the chamber to form thebandle p to manipulate its movement downward. When the bar is thus moveddownward the jaw g is free to be slid in either direction to adjust itrelative to the fixed jaw c to accommo-date the nut (not shown) on whichthe wrench is to be used. When the bar is released it springs intoengagement with the jaw and .firmly holds it ready for use. Where thejaw is open wider than is necessary, it may be moved to proper positionwithout manually'depressing the bar, on account of the preferred formgiven the teeth;

It is desirable that the chamber (1, the bar k, the pin Z and the slotsm be given suitable relative sizes so that the bar may be turnedtransversely within the chamberto free the pin from its engaging slotsin order that the ar may beeasily placed in position or removed whendesired. The bar is extended beyond the chamber at its rear end to formanother handle 9 to aid in turning it as above described, and alsoforholding the bar down atthat end if so desired, when releasing theadjustable jaw. When the bar is pressed down at its forward end, itrises at its rear end until the pin It strikes the ends of the slots m.It is therefore obvious that if the end the barwill not have to beforced down as far as when only the end 12 is depressed. The chamber (1is however -made deep 9 is depressed with the end 7/,

enough to provide for either operation' This improved construction ofthe locking bar enables the teeththereon and the teeth of the movablejaw to be normally in uni- 1 form engagement, that is to' say, itdistributes the force, applied at the handle in operating the wrench,among all the teeth on the jaw, instead of only upon a few as in thecase where the bar is pivoted in the manner shown in the patent abovereferred to.

The proper locking of the bar and jaw will also continue regardless ofthe wear of the parts. Such a construction also provides for an easyremoval and replacement of the look ing bar from the wrench, no toolbeing necessary to accomplish this.

Having thus described my invention, I claim:

A wrench comprising a hand lever having a head at one end; a jaw at oneend of the head; a chamber through the head, a rack bar within thechamber, a pin extending throughthe bar and having its ends disposed inslots formed in the head, a spring for holding the bar in raisedposition at both ends, an operating handle formed by projecting theforward end of the bar without the chamber, a movable jaw having a rackfor engagement with the rack of the bar when in normal position to locksaid jaw against outward displacement from the fixed jaw, and means forsecuring the jaw in slidlng relation in the head.

This specification signed and witnessed this 17th day of June A. D.,1912.

WILLIAM IRING.

M. P. WINNE.

